These are about 8 inches long. They can be customized as far as any way that flat plate can be cut with a laser. You will get the 5 pieces of plate, a spring pin, and a spring loaded pin assembly. You must weld and assemble this yourself. You will not get radius'd base plates like shown in the photos, they will be narrower and flat (the same as the plate on the fire extinguisher side of the plain mount). However, if you have a way to radius plate, I can send you the kit without certain pieces and the price would be reduced accordingly. Like also for permanent installs, like welding straight to a cage, you won't need the base plates either.

Lead time should be less than 3 weeks including delivery but I'm currently meeting 10 days including delivery

Kits with custom designs are $30. I have some designs already done up.

Shipping is extra. Up to 4 or 5 kits fit in the USPS flat rate box for $5.20. So for orders under that quantity, shipping will be $5.20.

These are tested and proven. I pre ran 40+ miles of a desert race course with no issues.

UPDATES:

These mounts are now also offered as welded assemblies ($40 for plain, $45 for customized, plus shipping). The new design also includes slots and tabs to help with assembly for the weld it yourself kits.